You'll have no trouble finding books about making and decorating cupcakes, but you'll have a hard time finding better books on the subject than Karen Tack & Alan Richardson's books [2]: What's New, Cupcake? [3] and Hello, Cupcake [4]! For Christmas cupcakes, take a look for the Blue Poinsettias, Oh Tannenbaum, Gingerbread Village, and more.
Links:
[1] http://hcpl.net/users/angel-hill
[2] http://catalog.hcpl.net/ipac20/ipac.jsp?menu=search&aspect=subtab13&term=tack%20richardson%20cupcakes&index=.GH#focus
[3] http://catalog.hcpl.net/ipac20/ipac.jsp?menu=search&aspect=subtab13&term=new%20cupcake%20tack%20richardson&index=.GH#focus
[4] http://catalog.hcpl.net/ipac20/ipac.jsp?menu=search&aspect=subtab13&term=hello%20cupcake%20tack%20richardson&index=.GH#focus
[5] http://hcpl.net/category/tags/cooking
[6] http://hcpl.net/category/tags/cupcakes
[7] http://hcpl.net/taxonomy/term/34